Coupler ® venous mechanic microanastomosis. An important technological contribution to microvascular surgery Aim: The aim of the present paper is to show the experience of the Plastic Surgery Division at the University of Chile Clinical Hospital, with the Coupler ® anastomotic device (Synovis Corp, Birmingham, AL) for venous microanastomoses in patients undergoing reconstructive microsurgery. Material and Methods: A retrospective review of 48 consecutive patients with free flaps between March 2009 and in February 2013. All microsurgical venous anastomoses were performed with the Coupler ® device and the arterial anastomoses with interrupted or continuous 9-0 or 10-0 nylon sutures. The collected data were: personal and medical patient information, location of the defect, flap used, vessels diameter, arterial anastomoses, Coupler ® used, time of anastomosis, postoperative complications, arterial and venous thrombosis. Results: A total of 48 free flaps were performed for reconstruction of lower extremity (n = 25, 52.1%); head-neck (n = 15, 31%); breast (n = 5, 10.4%